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Stability of Fe3+ -VO defect pairs in polycrystalline Pb(Ti,Zr)O3

Kutty, TRN and Balachandran, R (1985) Stability of Fe3+ -VO defect pairs in polycrystalline Pb(Ti,Zr)O3. In: Materials Chemistry and Physics, 13 (5). pp. 467-475.

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Abstract

The intensity of the EPR signal with g = 5.985 arising from a ferric ion â oxygen vacancy defect pair (Fe3+ â VO) in PbTiO3, varies with the extent of PbO nonstoichiometry at constant Fe3+ content due to an increased oxygen vacancy concentration. In PZT solid solutions, the signal intensity decreases with an increase in Zr. A lower intensity is also noticed for Fe3+ â VO signals in PbZrO3. This behaviour is explained on the basis of PbO nonstoichiometry arising from independent Pb- and O-vacancies as well as the randomly distributed crystallographic shear (CS) plane defects. The contribution to PbO nonstoichiometry from CS planes is larger in high zirconium compositions of PZT.

Item Type: Journal Article
Additional Information: The copyright of this article belongs to Elsevier Science
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Division of Chemical Sciences > Inorganic & Physical Chemistry
Depositing User: Paramesha S
Date Deposited: 23 Nov 2009 08:19
Last Modified: 19 Sep 2010 05:32
URI: http://eprints.iisc.ac.in/id/eprint/20274

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